Improvement in cikcular sawing machines



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IMPROVEMENT IN CIRCULAR SAWING MACHINES.

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TO ALL WHOM IT MAY CONCERN: i Be it known that I, LEWIS Fossnmof Jeffersonville, in the county of Clark, and State of Indiana, have invented a new and Improved vCircular SawingMachine; and I do hereby declare Ythat the following lis a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a plan,

Figure 2 is a side elevation. Y

Figure 3 is a vertical transverse'section, taken in the line :l: x, iig. 2,.

Similar letters of reference indicate like parts. 4

The nature ofV this invention consists in applying devices, to operatein connection with a circular saw, `for sawin g plank 4with bevelled edges or with curved edges cir sides when required, as yvell as straight edges and sides. The' machine is particularly designed for use in ship-yards to `edge plank of allkinds, and'saw in curved lines and out-gauge, so that bottom plank of vessels maybe finished upon the circular saivftable. Plank of any thickness can be sawed, and I propose to ,arrange the saw to cut a bevel to the extreme liniit usually required in ship building, say at an angle of 11%? with a square edge, or one inch on a four inch plank This machine embodies tivo distinct principles of operation; rst, by canting the saw at an 'angle to a perpendicular line, it

cuts bevels as desired andusecond, by sluing the plank around on a centre in the line of the saw arbor the sides or edgesare sawed to the desired curve as it travels on rollers to the saw. An immense economy `is effected by` thismachine, and great advantage in accuracy of execution as well as cheapness over hand-work.

A A represents the bed frame of the machine, and B B B are uprghts for supporting the machinery,1iig. 2.

0n the upper part on one sideof the machine are a series of horizontal rollers, a a a talig. 1, on which the plank u to be sawed is placed, `between the middle pair of whichris the circular saw, b. The saw is' hung uponan adjustable frame, C, iig. 3, which is so arranged as to ca nt the saw to any desired angle for cutting bevelled edges.

This frame is fastened to the face of two standards, c c, which are firmly fixed at the top and bottom, and stand on either hand of the large and small driving pulleys, D D', which are side by side on the shaft, d d. The frame C, is pivoted on a screw-bolt, e, upon which it may be turned to cant thesaw, b, by means of `a set screvf, on

one side, which is operated by the crank, g. The saw arbor or shaft, h,-hangs in boxes, z' z', onthe'upperlend of the frame, C, and thc driving pulleys. D D', are hung at a-,lower point onthe same frame on the shaft,ici1d,iso' that when the frame is movedby the screw, f, from side to side, the pulleys, D D', and the circular saw are moved together in line. In order to keep the frame, C,in place against the standards, c c, on one side is a. bolt,`k,

which lsets and works in a horizontal slot, and near the bottom on the opposite side a bolt, c-,`whch sets and works `in Va vertical slot, both slots being made in the frame, C. On the saw-shaft, h, is `a pulley,l, which takes motion from thel pulley, D,`by the side of the pulley, D', taking motion from the mainV driving pulley, E, iig.` 2. Independent of these devices for regulating the position and operation of the saw for sawing straight or bevel edges, there are other arrangements of machinery for sawing the plank with curved cdgcsgplaced on the opposite side of rthe'machine from the saw. Two horizontal cogged arcs or segment racks, F F', project from the upper side, at thc ends, on a level with the rollers, a a, on which traverse` two small cogivheels,

VG G'-, set on the ends of .the radiating shafts, 'm ,-'m', the central ends of which rest in turningboxes, `1t n', and p carry outside of the boxes on theirY extreme ends bevel gear-wheels@ o', which mesh into a right angled bevel,`

p, between them, set on the horizontal shaft, q, whichis driven bythe tra-in of cog-wheels, rr'r", iig. 2, operatedi by the hand-crank, s. By turning the crank, 8,the bevel, p, working into the wheels, `oto', and moving them in opposite directions, simultaneously operates on the radiating' shafts, m m', causing them to reciprocate or move together both ways on a common centre in a right line, by means of' the cog-wheels, GG, which travelin the segment racks, F F. Directly over and in line with the shaftsym m', and restingI on pegs Ain a frame, tt, which sets on the shafts at their ends, is a long round sliding bat: or guide-rod, H H, which moves to and -fro with `the shafts, m m', when they are operated by the crank, s, The dogs, I I', are made to slide on the rod, HH, and hold the plank in place on the rollers, a a, and will be made adjustable shorter or longer, as may be required.

In connection with the sawing machine an ordinary grappling and hoisting apparatusmill be placed near or over it for raising the plank from the ground, and placing it lengthwise on the rollers, a a. When the plank is i secured in its place the edge may be cut both'straight and square if desired, by giving it rectilinear motion and running the saw vertically, but it is evident from the. preceding description of the devices employed for canting the sawout of perpendicular, that a bevel edge can also be cut by it as required, 'and that the plank being held by the dogs, I I, will be slued around when the shafts, m m', are turned, and that as the plank shall travel in that position on the rollers, a a, the dogs, I I', sliding on the rod, H H, with'it, the desired curve will be out. I

do not confine myself to the particular arrangement of all the parts of my invention as herein represented, Since i several modifications of the machine may be made in it without deviating from the essential principles of its ope-ration, to wit: cantingA the saw for cutting bevels and slung thel plank around for cutting curves. In a full sized practical machine the saw will be made to cant on its shaft independeptlyof the pulley, and the pivot or centre on which it turns will be its own centre. All the rollers will be portable except those at the ends of the machine, to reinove or replace as desired, according to the nature of the stu to be'sawed, light or heavy, requiring more or less for support. i i

Having fully described the construction, use, and operation of my invention, what 4I claim as new and desire to secure by Letters Batent, is v 1. The adjustable slotted frame G, and set screivf, for canting the-saw, arranged and operating substantiallyfor the purpose specified.

2. Sluing the plank by means of the segment racks F F', wheels G G', radiating shafts,'m m', guide-rod' H, and dogs I I', substantially as described for the purpose specified. I

' LEWIS FOSSEE` Witnesses:

JNO. C. HOWARD,

JAMES HOWARD. 

